In short form- he failed to prevent a US-Iran rapprochement on nuclear weapons which remains hostile but clear of war; he appeared as the obvious culprit that dashed Secretary John Kerry's renewed and fervent efforts to renew the peace process; Palestinian national reconciliation took place under his watch and was accepted by both the US and the EU; and domestically he failed to prevent the precedency of Reuven Rivlin in his parliament.
His own power is severely cracking, and is in 2012 and before, Netanyahu took to beating down on Palestinians and drumming up violent public hysteria to draw attention away from his own failures as well as to flex his militant brass.
This is all repulsive and draped in the obfuscating language of national security. It is likely only the beginning since the bodies of the settler boys have not even been buried and laid to rest.
Bodies of Missing Settlers Found in West Bank, Al Jazeera
Israel's West Bank Operation: Causes & Consequences, Mouin Rabbani
Israelis demand blood after youths' bodies found, Ali Abunimah
Israeli forces 'prepare to demolish homes of kidnapping suspects', Ma'an News Agency
Israel Names Hamas' Marwan Qawasmeh and Amer Abu Aisha as Suspects in Kidnapped Teens Search, Gianluca MezzofioreThe Moral Economy of Settler Colonialism: Israel and the “Evacuation Trauma”, Nicola Peruguini